Speech Synthesis Cores

Acapela Group
Merger of TTS companies Babeltech, Elan and Infovox. Many TTS-engines with online demonstrations.
http://www.acapela-group.com

AT&T Natural Voices
Features a line of speech synthesis products. Demos on the site.
http://www.naturalvoices.att.com

Bitlips Speech Technologies
Finnish Speech Synthesis, offers small footprint as well as unit-selection engine. English language also available.
http://www.bitlips.fi

Cepstral Speech Synthesis
Text-to-speech for a wide selection of platforms - including servers, desktops and mobile. Provides a variety of languages, voices, and accents. Effective on line demo of speech quality.
http://www.cepstral.com

CSLU Speech Synthesis
Center for speech synthesis research, with demos and downloads available. Has a singing voice synthesis project.
http://cslu.cse.ogi.edu/tts/index.html

DEMOSTHeNES Speech Composer
A general-purpose multilingual and polyglot software text-to-speech (TTS) system that supports the Greek language using a wide variety of e-text sources. Free download has an open and component based architecture allowing flexibility, customization and expandability.
http://speech.di.uoa.gr/synthesis/demosthenes/en/information.shtml

Elan Speech
Elan Speech, dedicated global provider of text-to-speech (TTS) technologies for telecommunications, multimedia, embedded systems and mobile solutions. Provides 2 ranges of speech synthesis technologies for high quality and low footprint requirements. Many languages and voices available for various platforms and operating systems.
http://www.elanspeech.com

e-rhetor
Develops applications and systems that support the Greek language. Current products include a series of high quality Text-to-Speech products for the telecommunications and multimedia market.
http://www.e-rhetor.com

ESOPOS-Greek TTS
An unusual downloadable program for Win 95/98 that does Greek text-to-speech processing.
http://esopos.ee.auth.gr

E-Speech
Unusual text-to-speech synthesis offerings including name pronunciation software for speech recognition dictionaries and other custom applications.
http://www.espeech.com

The Festvox Project
Free software tools and documentation for building new speech synthesis voices in English and other languages. Associated to Festival TTS. From Carnegie Mellon.
http://www.festvox.org

Fonix Corporation
Communications and technology company that provides integrated telecommunications services and value-added speech technologies. The combination of interactive speech technology and integrated telecommunications services provides for solutions to enhance and expand their communications needs.
http://www.fonix.com

FreeTTS - Java speech synthesis
A speech synthesis system written entirely in the Java(TM) programming language. Based upon Flite: a smallrun-time speech synthesis engine developed at Carnegie Mellon University and derived from the Festival Speech Synthesis System from the University of Edinburgh and the FestVox project from Carnegie Mellon University.
http://freetts.sourceforge.net

Hindi Text To Speech System
Bliss Intelligent Technologies offers Hindi text to speech, Hindi OCR, Hindi speech recognition and IVR systems. Based Jaipur, India.
http://www.blissit.org

IBM Text-to-Speech Research
IBM Text-to-Speech (TTS) Research interactive demo, multi lingual, unconstrained.
http://researchweb.watson.ibm.com/tts/

ILSP - Ekfonitis+
Ekfonitis+, Greek Text to Speech Synthesis from the Institute for Language and Speech Processing, Athens, Greece.
http://www.ilsp.gr/ekfonitis_plus_eng.html

IMS: German Research Group
Speech synthesis group at the IMS, University of Stuttgart, Germany: Online demo, speaking metro information system, various speech synthesis example sand some downloads. Research is concentrating on getting good prosidy (inflection).
http://www.ims.uni-stuttgart.de/phonetik/synthesis/

Java Applet for Speech Synthesis
Java applet/software for speech synthesis using the concatenation method. Currently developing formant synthesis version.
http://www.say-it-now.com

Loquendo
TTS manufacturer from Italy, support for many languages, online demonstration available.
http://www.loquendo.com/en/technology/TTS.htm

MARY Text-to-Speech System
Open source TTS System for German, English and Tibetian based on Mbrola.
http://mary.dfki.de/

Matrubhasha
A Unicode and MBROLA based software solution for text to speech synthesis (TTS) in Indian languages.
http://www.ncb.ernet.in/matrubhasha/

NeoSpeech
TTS engine VoiceText is available in US English, Korean, Japanese and Mandarin Chinese.
http://www.neospeech.com

Nuance
TTS engine Realspeak available in many languages. Company (former Scansoft) bought many TTS-manufacturers, e.g. Rhetorical, ETI-Eloquence, Nuance, Lernhout and Hauspie.
http://www.nuance.com/

Sakrament
Speech recognition and synthesis software company, particularly Russian language. Markets a product to generate personalized voice-models (voice-cloning).
http://www.sakrament-speech.com

SVOX Interactive Text to Speech Demo
TTS-Demo of University of Zurich. Makes an .au file of German (only) text typed at web site.
http://www.tik.ee.ethz.ch/cgi-bin/w3svox

Teknoses Speech Solutions
Turkish Text-To-Speech engine for Microsoft Agent and SAPI compliant applications. Trial version downloadable.
http://www.teknoses.com

Voiceinterconnect GmbH
Wide range of products and services for embedded electronics including echo cancellation, DSP, speaker independent recognition and text to speech.
http://www.voiceinterconnect.de/index.php?newLanguage=en